Would Squall be better off being doing the missions on his own? (spoilers)

Quistis: Apologizing to Rinoa, will doing an important mission.
Going into the secret area in the training centre.
Rinoa: Do i need to start?
Irvine: almost didn’t attempt to shoot the sorceress.
He is more focused in getting a Girlfriend.
Selphie: Just annoying. She probably makes one later in the game.
Zell: I Can not think of one, suprisingly. Only one i can think of is riding the T-board in garden.
Seifer: Went into restricted area in Dollet Mission.

Squall seems to be the only one focused on the missions and there importance.

Why couldn’t the put other hardworking characters in the game?